KARPENKO V, BILYK A, GYMENUK R. DIGITAL PRESENCE OF COMPANIES IN THE VENTILATION MARKET OF UKRAINE: COMPARATIVE ANALYSIS OF WEBSITES, SOCIAL MEDIA AND BRAND BOOKS. Herald of Khmelnytskyi National University. Economic sciences. 2025;342(3(2):147-152. doi:10.31891/2307-5740-2025-342-3(2)-23